Heater for water-bottles.



H. W. CHRISTIAN.

HEATER FOR WATER BOTTLES. APPLIOATION FILED MAY 1a, 1908.

925,681 Patented June 22, 1909.

HERBERT W. CHRISTIAN, OF LONGBEACH, GALIFORNIA.

HEATER FOR WATER BOTTLES.

Specification of Letters Patent.

Application filed May 18, 1808.

Patented June 22, 1909 Serial No. 433.610.

To all whom it may concern:

Be it known that I, HERBERT WV. CHRIS- TIAN, a citizen of. the UnitedStates, of America, residing at Longbeach, in the county of LosAngeles,--State-of California, have invented a certain new and usefulHeater for deter-Bottles; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to means for heating lluid which may be containedin any suitable receptacle, but relates more particularly to means forheating such fluid as may be used in hot-water bott es or the like.

(1118 object of the invention is to provide for such purpose, aneiiective heating means which is simple and inexpensive in constructionand operation, also durable and convenient in use, and easily adjustableto obgaini desired temperature conditions of the ui Another object ofthe invention is to furnish a heating means the action of which'isautomatically controlled to keep the tem perature of the heated fluidapproximately at a redetermined value.

Still another object of the invention is to provide a construction inwhich the parts are readily accessible for renewal or repairs.

Gther objects of the invention will be aparent from the followingdescription of one orm in which it may be embodied to adapt it for usein connection with hotwater bottles; reference beinghad to theaccompanying drawings forming art hereof, in which,

Figure 1 is a longituginal sectional View of the invention as applied toa liot-waterbot tle. Fig. 2 is a View in perspective of the thermostaticswitch and associated parts. Fig. 3 is a view of the form of a stampingblank forming part of the above. Fig. 4 is a sectional View of thebuilt-up device, taken on the dotted line 4 4 of Fig. 1.

listening to the drawings, 2 designates a water bottle constructed ofany suitable material, preferably rubber; which bottle may be providedwith the sto pered aperture 3, to permit either introduction of fluidinto the bottle or withdrawal of the same therefrom. Passing throu h anopen'ng in the bottle and extending wel into the interior thereof is acasing 4, which is open at the upper end and casing is secured to thebottle at the upper part thereof, by a water-tight joint.

When, as shown in Fig. 1 of the drawing, the casing is provided with thethreaded depending annular flange 5, the neck of the bottle if of rubbermay occupy the space 6 between the casing and the flange and bevulcanized to form a water-tight joint.

As will be understood, the temperature of the fluid in the bottle may begoverned by controlling the radiation of heat from the casing to theliquid. To supply the necessary heat in the casing and to regulate theamount thereof, a built-up device fitting in the casing and comprising aheating coil associated with a' thermostatic switch, is preferablyeniployed. The heating coil may be wound on any suitable core 9 ofinsulating material, such as porcelain and, in order to obtain betterregulation of heat generation by the coil, it may be divided into twoparts or coils 7 and 8, each of a suitable number of turns. As shown,the upper coil 7 and the lower coil 8 are each connected with thethermostatic switch which in this instance is arranged to establish,under predetermined conditions, a shunt circuit with respect to the coil7. The head 10 of the core is preferably of increased diameter and hasfitted thereto a metal sleeve 11 which is partly threaded as at 12, toscrew into the top of the casing when the heating device is positionedtherein. Interiorly of'the core 9 are provided longitudinal ducts 13 and17 which communicate with transverse ducts 13 and 17 One end 13 oi thecoil 8 leads through the ducts 13 and 13 in the core 9 and may beconnected to the contact pin 14 in the head 10 by means of the nut 15 inthe recess 16 in the core. The other end 17 leads through the transverseduct 17 near the bottom of core 9 tothe duct 17, thence to the lower endof the core where it passes around bolt 18 and is clamped by means ofthe nut 19 in the cutaway portion 21 of the core. The end of the wire isthen led upward through duct 17 to a point above the top of coil 8,where it passes outward through duct 17 and is wound around core 9 toform coil 7. The upper end of coil 7 is secured to sleeve 11.

The movable element 20 of a thermostatic switch may be carried by thebolt 18 and also clamped in position by the nut 19, and may be of anyvsuitable or approved construction.

is preferably constructed of metal. This yFOI instance, it may consistof a bar composed of two metals having different degrees of expansionunder the same temperature; say copper for the left hand part of thebar, and steel for the right hand part of the bar. The lower end of themovable element 20 is normally in contact with the contact-pin 21 of thethermostatic switch. The contact-pin 21 screws in the metal bushing 23and has its end 22 ta ered for a purpose hereinafter mentioned.Etta-chad to the core 9 and carrying the bushing 23 is the member 24,which is preferably made up of two similar stampings 25 of sheet metal;the form of the stampings in blank being shown in Fig. 3.

In the making up of the member 24 the ends of arms 27 of the twostampings are lookseamed together, thereby forming a ring adapted to fitover the lower end of core 9.- The lower ends of the stampings. are bentat right angles to bring into registry holes 26 into which bushing 23may be pressed. The member 24 may be secured to core 9 by forming one ormore indents 28 fitting in corresponding depressions in the core.

The extensions 29 at the top of the stampings are bent outwardly anddownwardly so as to contact closely with the interior wall of the casingand also serve to hold the built-up device steady in the casing.

The construction embodying the inventionhaving been'described, itsoperation will now be explained. Assuming that the bottle contains thenecessary liquid, which may be initially heated, and that the built-updevice is adjusted in the casing; then, in order to generate heat in thecasin the user ma screw the socket of a drop-light on the she I 5 andobtain current from the lighting circuit for the purpose. So long as thethermostatic switch is closed, the coil 7 will be shortcircuited, andcurrent may pass from contact-pin. 14, to lead 13*, through heating coil8, across the switch by means of lead 17 to extensions 29 of the member24, thence to the casing and shell 5. When the temperature in the casinghas risen to such a degree that the switch is actuated to open thecircuit which has been traced, the current passes from the contact-pin14, to lead 13,

through coil 8, to terminal bolt 18, by lead 17 thence through the leadfrom terminal bolt 18 to coil 7, through. coil 7 to metal sleeve 11,thence to the casing and shell 5.

.Since no arcing occurs when the thermostatic switch opens, platinumcontacts may be dlspensed with.

From the foregoing it will be seen that 'While the thermostatic switchis closed, in-

creased current flows in the heating coil Stu generate heat in thecasing; and that when the switch opens,,a decreased current passesthrough both heating coils, in consequence of which the heat generatedin the casing is correspond ngly lessened; the resistance of the col 7belng so adjusted, in view of the possibe set to open or close when thetemperature in the casing reaches prearranged values.

It is to be noted that while the construction shown and described issuch as will permit of the use of-a lamp-socket of the Edison type toobtain current from the lighting circult, a modified construction topermit the use of a socket not of the Edison type will readily occur tothose skilled in the art.

While the construction of one form in which the invention may beembodied to ada t it for use in connection with a hot-water ottle hasbeen specifically described, it is evident that it may be employed inother relations and that various changes and modifications may be madewithout departing from the scope and principle of the invention.

I claim:

1. The combination with a water bottle, of a metallic casing arrangedtherein, a built-u device removably fitted in said casing, said devicecomprising a heating coil and an adjustable thermostatic switch arrangedto short-circuit apart of said coil until a prearranged temperature isreached.

2. The combination with a water bottle, of a metallic casing arrangedtherein, a built-up dev ce removably fitted in said casing, said devicecomprising a core of insulating material, a heating coil on-said core, athermostatic switch carried by said core, said switch electricallyconnected with parts of said coil and with said casing underpredetermined conditions, and means disposed at the head of said corefor electrically connecting said coil with a source of energ 3. Thecombination with a Water bottle, of a metallic casing arranged therein,and a built-up device fitting in said casing, said device com risingmeans for electrically heating flui contained in said bottle, and athermostatic switch for automatically controlling said heatin means tokeep the temperature of the fluid approximately at a prearranged value.

4. The combination with a water bottle, of a metallic casing arrangedtherein, and a built-up device fitting in said casing, said devicecomprising means for electricall heating fluid contained in said bottle,a t ern1ostatic switch for controlling said heatirwmeans to keep thetemperature of the iluiil 5. The combination with a water bottle,

vice fitting in said casin said device com-' rising a heating coil anadjustable means or short-circuiting a portion of said coil until apre-arranged temperature is reached.

7. The combination with a water bottle, of

a metallic casing extending therein, a builtup device removably fittedin said casing,

.- said device comprisin a heating coil and a thermostatic switch sort-circuiting a portion of said coil until a prearranged temperature isreached.

8. The combination with a water bottle, of a casing extending therein, abuilt-u device v removably fitted in said casing, sai device prising aheating coil and an adjustable thermostatic switch short-circuiting aportion of said coil until a prearranged temperature is reached.

11. The combination with a water bottle, of a metallic casing arrangedtherein, a builtup device fitting in said casing arranged and a a tedfor connecting with a single source of e ectrical energy, said devicecomprising a heating coil and means automatically controllin theelectrical energy in said coil to keep t e temperature of the waterapproximatelyat' a pre-arranged value.

12; A built-up device comprising a core of insulating material, metallicparts carried on said core, a heating coil on said core, said coilhaving ends thereof connected with said metallic parts, a member on saidcore rovided with means adapted to contact wit the interior wall of acasing, and a movable element of a thermostatic switch carried by saidcore find associated with said coil and said mem- 13. A built-up devicecomprising a core of insulating material, metallic parts carried on saidcore, a heating coil on sa1d core, said coil having ends thereofconnected with said metallic parts, a member on said core rovided withmeans adapted to contact wit the interior wall of a casing, and amovable element of,a thermostatic switch carried by said core andadjustably associated with said coil and said member. p

In testimony whereof, I have signed my name to this specification in theresence of two subscribin witnesses at on 'beach county of Los ingeles,State of Oaliiornia, this 9th da of Ma A. D. 1908.

- IERB RT W. CHRISTIAN.

Witnesses:

SUSAN L. CHRISTIAN, ALEXANDER H. Lrmmns.

